Facing and deburring handtool

ABSTRACT

A handtool for facing off and deburring the rough cut ends of plastic pipe, the cutting tool bit structure being mounted parallel to the work-receiving bore and being adjustable by projecting knobs which are also handles to aid the user in rotating the handtool while pressing the same onto the pipe, the casing of the handtool having a work-receiving bore and a thick block-like portion closing one end of the bore and providing support for the cutting tool bits in the form of small bores extending parallel to the axis of the pipe rather than in the usual transverse or radial disposition.

I United States Patent {151 3,661,472 Beauloye [451 May 9, 1972 54]FACING AND DEBURRING HANDTOOL FOREIGN PATENTS OR APPLICATIONS [72]Inventor: Ronald A. Beauloye, 2217 La Cresta 889 6/191 1 Great Britain..82/4 C R d, E1 c j C lif, 9202 715,297 8/1965 Canada ..82/4 C [22]Filed: 1971 Primary Examiner-Robert C. Riordon 2| L N 113 155 AssistantExaminer-J. C. Peters I 1 App 0 Attorney-Knox & Knox [52] US. Cl...408/231, 30/92, 82/4 C R T [51 1 3" A handtool for facing ofi anddeburring the rough cut ends of [58] Fleld ofseal'ch..30/263,264,276,300,310; plastic pipe the cutting tool i structurebeing mounted 82/4 C; 29/103, 105; 408/227, 2 parallel to thework-receiving bore and being adjustable by projecting knobs which arealso handles to aid the user in [56] References Cited rotating thehandtool while pressing the same onto the pipe, the casing of thehandtool having a work-receiving bore and a UNITED TA PATENTS thickblock-like portion closing one end of the bore and providing support forthe cutting tool bits in the form of small 2,900,858 8/1959 Gauthier"6832/: C bores extending parallel w the axis of the pipe rather than in11273563 4/1964 Karla l 0 X the usual transverse or radial disposition.3,365,988 1/1968 Karlan ..30/310 X 3,266,345 8/1966 Weisner ..408/227 X4 Claims, 4 Drawing Figures tIIIIIIIII PATENTEBMY 9 I972 3, 661 ,472

Fig. 2

Fig.3 28 36 INV TOR. RONALD A. B ULOYE FACING AND DEBURRING HANDTOOLBACKGROUND OF THE INVENTION Several cutting and chamfering tools, foruse both in the shop and in the field, have been developed, these priorart devices being, usually at least, conceived and designed for use onmetal pipe. The cutting tool bits of prior devices are made adjustablefor depth of cut and to compensate for wear in use and sharpening butare arranged at right angles or radially of the work-receiving bore andthe chip-escape is ordinarily provided for by making the tool casingopen at the end adjacent to these above mentioned radially mounted toolbits. In prior art devices some care must be exercised by the workman toavoid damaging the tool bits and there exists a need for a simplehandtool into which a rough cut end of a plastic pipe can be pressedquickly and easily without fear of damaging the tool bit or the settingthereof, the pipe end ordinarily being pressed directly against theblock-like portion closing the end of the work-receiving bore.

SUMMARY OF THE INVENTION As claimed, this handtool is essentially acasing which is illustrated as a slightly elongated cylinder with anaxial bore to receive the work, ordinarily a rough cut end of plasticpipe, the casing including a solid or block-like portion closing whatmay be considered the inner end of the bore and this solid portion issufficiently thick, in the direction of the axis of the bore, toaccommodate at least one cutting tool bit disposed parallel to the boreand adjustableand anchored by combined tightening knobs and handles.Since the work-receiving; bore is closed at the end adjacent the toolbit structure, provision is made for escape of chips or cuttings. Thetool bits perform the operations of facing off the rough cut end of thepipe and bevelling it both internally and externally for connection incouplings and the like.

BRIEF DESCRIPTION OF THE DRAWING In the drawings:

FIG. 1 is a front end elevation of the handtool;

FIG. 2 is a top plan view of the same;

FIG. 3 is a vertical cross-sectional view of the handtool, takensubstantially on the line 3-3 in FIG. 1, the figure being complementedby a side elevational view of a short section of a plastic pipe,partially broken away and shown in section, to illustrate the manner ofusing the invention", and

F IG. 4 is an enlarged fragmentary sectional view of a section ofplastic pipe which has been faced off and bevelled internally andexternally by the handtool.

DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT The casing, generallyindicatedby the numeral 10, may be variously shaped but is convenientlymade cylindrical as illustrated, slightly elongated and with flats 12formed on diametrically opposite sides. A work-receiving bore 14 extendsfrom what may be considered the front end of the handtool to a depthsufficient to assure proper orientation of the workpiece, ordinarily therough cut end of a section or nipple of plastic pipe such as is commonlyused in plumbing, as indicated at 16.

A solid or block-like portion 18 of the casing extends from the innerend of the bore 14 to the rear of the handtool and this portion 18 musthave a considerable thickness dimension measured axially of the bore 14to accommodate smaller bores 20. These smaller bores 20 are illustratedas of circular cross sectional shape and extend from the inner end orface 22 of the work-receiving bore 14 to a depth in the portion 18sufficient to accept cutting tool bits 24 and 26. These smaller bores20, tool bits 24 and 26, and above mentioned flats 12 are aligned in twoopposing sets, diametrically opposed and slots 28 are provided in thecasing, elongated in the same direction, to accommodate spindles 30which are terminally threaded into the shank portions 32-34 of the toolbits 24 and 26. Tightening knobs 36 are fixed to the outer ends of thespindles 30. p

The tightening knobs 36 are relatively large since they have a secondarybut equally important function as handles to facilitate rotating thehandtool in use. Flat faces 38 on the tightening knobs engage the flats12 and the tool bits are thus firmly clamped in place, the slots 28 ofcourse permitting adjustment of the tool bits toward and away from thebore 14.

The tool bit 24 has a cutting edge 40 to produce an internal bevel 42 onthe pipe 16 as indicated in FIG. 4. The tool bit 26 has a dual cuttingedge 44-46, the part 44 being the principal end facing cutting edge andthe part 46 producing an external bevel 48 on the finished pipe 16.

Since the bore 14 is closed by the portion 18 of the casing it isnecessary to provide chip-escape openings 50 adjacent to the cuttingedges of the tool bits and these openings 50 extend rearwardly as wellasforwardly of the cutting edges and inner end face 22 of the bore 14,as shown in FIGS. 1 and 2 as well as in FIG. 3, for more trouble freeoperation of the tool due to a lessened tendency for the chips orshavings to clog the cutters.

Finally, the casing 10 is provided with a wrench-receiving nut 52 fixedto or unitary with the casing and extending axially thereof to permitthe user to apply extra torque on the handtool when required.

The operation of the handtool will be obvious from a consideration ofthe foregoing abstract and specification, it being noteworthy howeverthat the item can be roughly used without damage and no great care isnecessary in inserting the pipe since the tool bits are not easilybroken because of their unique orientation and juxtaposition with theend face 22 which functions as a stop in certain cases where the roughcut end of the pipe is very irregular and preventing entry of the pipebeyond the tolerance or ability of the cutters to face off the end ofthe pipe.

I claim:

1. A facing and deburring handtool for use particularly with plasticpipe, comprising:

a one-piece casing, slightly elongated and dimensioned to be handheld;

said casing having a work-receiving bore iri one end of the casing toreceive a rough cut end of a pipe;

said casing having a block-like portion at the other end of the casingand closing the inner end of said bore;

a smaller bore in said block-like portion communicating with saidwork-receiving bore at the periphery thereof and extending parallelthereto;

a cutting tool bit having a cutting edge at the junction of said bores,facing toward the work-receiving bore, and a tool bit shank portion insaid smaller bore;

said block-like portion having a thickness dimension greater than thelength of said cutting tool; and

means for securing said tool bit shank portion in said smaller bore forlongitudinal adjustment therein, toward and away from saidwork-receiving bore and longitudinally thereof, for chamfering action onsaid rough cut end of a pipe when the handtool is pressed thereon andsimultaneously rotated.

2. A facing and deburring handtool according to claim 1 wherein saidblock-like portion has a slot adjacent to and elongated in the directionof said smaller bore, and said means is a spindle threaded into saidtool shank portion and slidable along said slot, with a tightening knobon the spindle to fix the cutting tool in adjusted position.

3. A facing and deburring handtool according to claim 2 and including asecond smaller bore with a second cutting tool operatively mountedtherein, said cutting tools between them having cutting edges to faceoff said rough cut end of a pipe and to bevel both the outer and inneredges, said casing having chip-escaping openings adjacent each of saidcutting tools.

4. A facing and deburring handtool according to claim 3 and wherein saidsecond cutting tool also is also adjustable with a tightening knob, andsaid tightening knobs are on opposite sides of said casing and projcctsufficiently from and on opposite sides of said casing as handles tofacilitate manual rotation of the casing in use.

i i i I!

1. A facing and deburring handtool for use particularly with plasticpipe, comprising: a one-piece casing, slightly elongated and dimensionedto be handheld; said casing having a work-receiving bore in one end ofthe casing to receive a rough cut end of a pipe; said casing having ablock-like portion at the other end of the casing and closing the innerend of said bore; a smaller bore in said block-like portioncommunicating with said work-receiving bore at the periphery thereof andextending parallel thereto; a cutting tool bit having a cutting edge atthe junction of said bores, facing toward the work-receiving bore, and atool bit shank portion in said smaller bore; said block-like portionhaving a thickness dimension greater than the length of said cuttingtool; and means for securing said tool bit shank portion in said smallerbore for longitudinal adjustment therein, toward and away from saidwork-receiving bore and longitudinally thereof, for chamfering action onsaid rough cut end of a pipe when thE handtool is pressed thereon andsimultaneously rotated.
 2. A facing and deburring handtool according toclaim 1 wherein said block-like portion has a slot adjacent to andelongated in the direction of said smaller bore, and said means is aspindle threaded into said tool shank portion and slidable along saidslot, with a tightening knob on the spindle to fix the cutting tool inadjusted position.
 3. A facing and deburring handtool according to claim2 and including a second smaller bore with a second cutting tooloperatively mounted therein, said cutting tools between them havingcutting edges to face off said rough cut end of a pipe and to bevel boththe outer and inner edges, said casing having chip-escaping openingsadjacent each of said cutting tools.
 4. A facing and deburring handtoolaccording to claim 3 and wherein said second cutting tool also is alsoadjustable with a tightening knob, and said tightening knobs are onopposite sides of said casing and project sufficiently from and onopposite sides of said casing as handles to facilitate manual rotationof the casing in use.